I'm a long time GPS user, first one was a Garmin EMAP, then two 2610s, and now a 2720. These are on the bike, I've also had a couple of Nuvi's (first was stolen) that I use in the truck. I prefer the Nuvi's for virtually anything I do, and I use a GPS almost daily.
It's time to replace my 2720 and I can't bring myself to pull the trigger on a $500-600 Zumo. I can get a Nuvi 855 for $110 that has features that the newest Zumo's still don't have. I understand the waterproof difference, and don't see that as a big deal. I also know about but don't buy into the "resistance to vibration" difference.
Is anyone running a Nuvi on their bike? handlebar mounted? How has it held up for you?
I will probably go with a Nuvi 855, if it dies I'll throw it away and get another one. I can't believe that a Zumo is 5 times better than a Nuvi, or will outlast 5 Nuvi's.
I want to go with this model for the MP3 capability. Don't care about bluetooth or XM radio, well XM would be nice but I'm not paying for the subscription.